DOUG S HEADERS D3347 4-Tube Full Length Header Chevrolet Instruction Manual

DOUG S HEADERS D3347 4-Tube Full Length Header Chevrolet

A Per’Tronix Performance Brand ~ wwW.pertronixbrands.com~ 909 5995935

Installation Instructions& Warranty Information

D322 Chevrolet 396-502 Big Block (Std. Deck Height) 1970-72 Camaro~ 1964-73 Chevelle/El Camino 1970-74 Monte Carlo 1970-74 Full Size Car & Wagon Long Tube Headers

WARNING:
This product can expose you to chemicals including Lead, Nickel, Cadmium and Chromium which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov

PERTRONIX PERFORMANCE BRANDS EMISSIONS CODES
This product Is Legal for use on Pre-Pollution Controlled Vehlcles. It is legal for use on all vehicles produced Before Emisslons Control Regulatlons were Imposed. These are considered Uncontrolled Vehicles and are defined as follows;

• 1965 and Older US Manufactured Californla Certifhed Vehlcles
• 1967 and Older US Manufactured Federally Certified Vehides
• 1967 and Older Forelgn Manufactured Vehlcles

PERTRONIX PERFORMANCE BRANDS EMISSIONS CODES
This Product is LEGAL for Closed Course Competition use or Pre-Emissions Controlled Vehicles ONLY. It is Not Legal for use on any Emissions Controlled Vehicle for Street or Off Highway use.

PLEASE READ BEFORE PROCEEDING

PerTronixthanks you for choosing a Doug’s Headers Product. To realize the potential of Doug’s Headers engineering and excellent fit, Please Read and Understand these instructions completely prior to starting the installation. Check that you received all the parts listed on the parts list, if you have any concerns, please contact PerTronix before continuing. Headers will have the part number stamped in the flange. Many factors affect he installation of exhaust headers, including worn or aftermarket motor mounts, previous accident damage, aftermarket cylinder heads that may have relocated port or spark plug locations, suspension and steering changes, saggingg of original unibody structures due to age.

Coating Notes: Coatings can be marred during installation if you are not careful. If you are breaking in a new motor, the extreme heat can alter the appearance of the coating and this is not a warranty issue. We recommend breaking in new motors with stock manifolds or an old set of headers. We use sealing beads on all our headers. The raised bead creates a better seal virtually eliminating leaks if installed properly. It is important to install all header bolts lightly snug and then tighten to factory torque specs starting in the center and working outward. Before starting, allow the vehicle to cool, disconnect the battery, and spray a penetrating oil on ll hardware and fittings that will need to be removed. Once you remove your manifold, clean the sealing surface on the head of any old gasket debris or carbon build up.

• Work Smart – Work Safe! Most Header and Exhaust Installation are best performed on a lift. If a lift is not available, raise the vehicle and support on quality Jack Stands on level ground. Do not rely on a jack!

DISASSEMBLY

• Remove bolts attaching Catalytic converters to stock manifolds
• Unplug the forward oxygen sensors from the manifolds.
• Remove the oil iller cap and the remove the plastic engine covers by pulling upward from the bottom edge and sliding past the braided fuel line.
• Remove spark plug wires and spark plugs.
• Remove the 6 manifold bolts from each manifold.
• Remove the manifolds from the car.
• Remove the gaskets and any gasket material or any carbon deposits that remain on the head surface.

INSTALLATION

• Remove the Oxygen Sensors from the stock manifolds and install them into the Doug’s
• Headers. Use a small amount of Anti Seize on the threads; be careful not to get any on the probe as this can contaminate the sensor causing poor running and decreased performance.
• Starting on the passenger side, Install the right side header and gasket using the supplied bolts and washers. Tighten the center two bolts first and then work your way out.
• Install the spark plugs, wires, and Oxygen sensor connector.
• Install the left side header and gasket using the supplied bolts and washers using the anti seize and silicone sealer in the same manner as the right side.
• Install the spark plugs, wires and Oxygen sensor connector.
• Bolt the supplied reducer to the collector using the gaskets and bolts provided.
• Connect the negative battery cable.

IMPORTANT CHECKLIST

• Be sure that all brake lines, transmission lines, and fuel lines are clear of headers and/or connector pipes.
• All spark plug wires, battery cables, or other electrical components should be clear of headers and/or connector pipes. dipstick tube was removed, make sure it is installed properly and that the dipstick has been replaced
• Double-check the tightness of all bolts including brackets and accessories

START THE ENGINE
Start the engine and allow it to warm up to operating temperature. Check for any unusual noises or ovhaust leaks. If everything is OR, Stop uc r thav have not loosened. Re-tighten arte
warm.

NOTE: Choc h e engine and tighten all bolts while the enaine is still the first 500 miles and then again at 1000 miles Sure tr have n tne Tirst b00 miles and then again at 1000 miles.

Parts List

• 1 Left Side Header
• 1 Right Side Header
• 2 Header Gaskets
• 2 3” Reducers
• 2 3” Collector Gaskets
• 16 3/8”-16 X 1” Header Bolts
• 6 3/8”-16 X
• 1 ¼” Hex Head Cap Screws 6 3/8”-16 Hex Nut
• 22 3/8” Lock-Washers
• 1 ¾” Power Steering Spacer
• 2 3/8” Spacers 2 Doug’s Sticker

DOUGS HEADERS LIMITED WARRANTY

All Doug’s Headers and Exhaust products are guaranteed, to the original purchaser, to be free of defects in material and workmanship for one year from date of purchase. This warranty covers the replacement or repair of the product and does not cover the cost of removal and installation, customer- applied coatings, or Any discoloration or corrosion of finished surfaces. Damage or product failure resulting from a collision, improper installation, off-road use, road hazards, the use of exhaust insulating wrap, or rust occurring after installation is not covered by the warranty. This warranty extends only to the original purchaser. Should a part be deemed defective, it should be returned to the original selling retailer and must be accompanied by the sales receipt. If there is no retailer in your area, contact PerTronix direct for a return authorization and return the part prepaid to the factory for inspection. PerTronix reserves the right to replace or repair the alleged defective part and return the part freight collect.

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